A Pennsylvania amusement park has been besieged with complains after firing a special needs employee of more than a decade for failing a simple test.

Christopher Emery, 29, has worked at Dorney Park and Wildwater Kingdom in Allentown for the last 12 summers cleaning bathrooms.

However he was let go this week after being asked to undertake a group activity exercise with potential new employees, who were teenagers.

According to his mother, Claudia Emery, the test included building a train with Lego and reading flash cards, which he struggled with.

'They treated him very poorly': Christopher Emery, 29, has worked at Dorney Park and Wildwater Kingdom in Allentown for the last 12 summers cleaning bathrooms, but was told this week he will not be returning

After completing the exercise, Mrs Emery was informed her son did not do well, and would no longer have a job at the park.

'This should never have happened,' Claudia Emery told local newspaper The Morning Call.

'They treated him very poorly.'

Mrs Emery said she struggled to explain to her son what had happened.

'I had to hold everything back until we got out the door,' she said.

'I told Chris that he was not going to work at Dorney this season. He didn't understand.'

However the story took a turn when another park employee, Matt Redline, wrote an angry post on Facebook that quickly went viral.

Taking action: This moving post by Matt Redline, an amusement park employee and Emery's friend, went viral on Thursday, and forced Dorney Park and Wildwater Kingdom to reassess their decision

Redline accompanied the post with a photo of Emery holding up a certificate acknowledging his 12 years of work at the amusement park.

'I can't express how angry and hurt I am right now!!!' he wrote.

'You should all be ashamed of yourselves

'Chris lived for that park. He has a bigger heart than any of you will ever know and it sickens me that a company who prides themselves on cornerstones and family values would turn their backs on one of their most loyal employees for being different.'

The post was shared over 18,000 times, and generated over 1,000 comments.

As a result, the park was forced to reassess their treatment of Emery.

Christopher Emery's mother, Claudia (pictured) said she doesn't want her son going back to the South Whitehall Township park to face more humiliation

Dorney Park & Wildwater Kingdom is an amusement and water park owned and operated by Cedar Fair and located outside Allentown, Pennsylvania

Mike Fehnel, the park's general manager, says the company respects and values all of their workers.

He also said they want Emery back.

'We respect, value and appreciate all of our dedicated associates,' Mike Fehnel, Vice President and General Manager of Dorney Park and Wildwater Kingdom, wrote to Facebook.

'I've known Chris for many years, and when I became aware of this situation I requested that we immediately reach out to him and his family to let them know that we would happily welcome Chris back for a 13th season.'

The news came as a huge relief to Emery's mother.

'It's overwhelming,' she said of the response and attention from friends, as well as strangers.